Glove-sewing machine.



F.1. KAUFMANN.

GLOVE SEWING MACHINE.

APPLICATION FILED OCT. 27. I9I3.

1,145,148. Y Patented July 6, 1915.

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GLOVE SEWING MACHINE.

APPLICATION FILED ocr. 21. 1913 1,145,148. Patented July 6, 1915.

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F. 1. KAUFMANN.

GLOVE SEWING MACHINE.

APPLlcATloN FILED ocT. 21. 1913.

Patented July V6, 1915.

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GLOVE SEWING MACHINE.

APPLICATION FILED OCT. 27I 1913.

Patented July 6, 1915.

4 SHEETS-SHEET 4.

nnrn sara@ MTN@ FRANK J. KAUFMANN, or AMSTERDAM, NRW YORK, AssrGNoR on ONE-HALF To FREDERICK c, TRAUTMAN, or .ar/rsfrnRDAr/r, Nnw YORK.

GLOVE-SEWING MACHINE.

Speciication of Letters Patent.

'Patented July 6, 191,5.

Application led October 27, 1913. Serial No. 797,375.

To all 'whom t may concern Be it known that I, FRANK J. KAUFMANN, a citizen of the United States, residing at Amsterdam, county of Montgomery, and State of New York, have invented certain new and useful Improvements in Glove- Sewing Machines, of which the following is a specification.

The invention relates to such improvements and consists in the novel construction and combination of parts hereinafter described and subsequently claimed.

Reference may be had to the accompanying drawings, and the reference characters markedthereon, which form a part of this specification. Similar characters refer to similar parts in the several figures therein.

F igure 1 of the drawings is a top plan view of a glove-sewing machine provided with my improved automatic thread-lock. Fig. 2 is a view partly in side elevation and partly in vertical section with the threadlock open as when the machine is being operated to embroider or stitch a glove, the sewing-mechanism being shown in the position occupied at the completion of the sewing operation preparatory to withdrawing the work from the machine. Fig. 3 is a view similar to Fig. 1, showing the thread-lock closed and the slack thread taken up by the removal of the glove from between the feeddisks of the machine. Fig. l is a view similar to Fig. 1, illustrating the manner in which the thread-lock is automatically opened by the initial forward movement of the needle-bar.

Certain features of the invention are applicable to various types of sewing-machines, but the invention is more particularly adapted for glove-embroidering -machines employed for ornamenting the backs of gloves.

rIhe principal object of the invention is to prevent waste of the threadby the operation of withdrawing the work from the machine. This object I accomplish by means of automatic thread-lockingmechanism which is automatically locked upon the thread by the operation of releasing the work from the machine, and which is automatically unlocked to release the thread when the machine `is. again started.

Referring to the drawings wherein the invention is shown in preferred form, 1 is the body of a well-known type of `glovesewing-machine wherein the work is clamped by, and fed between, a pair of disks, 2v and 3, the disk, 2, having a rotative feed-movement and the disk,l 3, being rotatively mounted uponthe upper arm, 4, of an anglelever fulcrumed at 5 upon the body of the machine. The lower arm, 6, of said anglelever is engaged bya spring, 7, which tends to hold -the disk, 8, yieldingly against the disk, 2. The machine hasthe usual stitchforming mechanism including a needle, 8, carried by a reciprocatory needle-bar, 9, and a looper, 10, the needle and looper being each supplied by a separate thread. The looper-thread, 11, passes from a guide-post, 12,through a tension, 13, and-the needlethread, 11a, passes from a guide-post, 14, through a tension, 15, all in the usual manner.

The mechanism-thus far described is common to such machines and is well understood in the art, and it will not be necessary to further explain the same in detail.

In carrying out my invention I erecta spindle, 16, from a bracket, 17, which projects from the body of the machine at the back thereof, and vslidably mount upon said spindle a sleeve, 18, which rests upon a coilspring, 19, tending to support the sleeve yin an elevated position. Upon the upper arm of the post, 16, is mounted'a cap, 20, having a depending flange, 21, adapted to receive and closely fit the upper end of the sleeve, 18.

The spindle, 1,6, is provided with a transverse aperture, r22, adapted to freely receive the two threads, 11 and 11a, and the sleeve, 18, is provided with similar apertures, 23, adapted to freely receive said threads and adapted in the lowermost position of the sleeve, 18, to register with the aperture, 22, in the spindle. When the apertures, 22 and 23, are in alinement with each other, the threads, 11 and 11a, can pass freely therethrough to thesewing-mechanism, but, as will be seen from an inspection of Fig. `3, when the sleeve, 18, is permitted to be forced upward by the spring, 19, the threads will be drawn upward with said sleeve between the wall of the sleeve and the inclosed spindle, 16, and between the wall of the sleeve and the inclosed flange, 21, on the cap, 20, whereby the threads are wedged in between the spindle, 16, and flange, 21, of the cap, and are caused to change direction abruptly several times which effectively prevents any feeding-movement of lthe is in its elevated position. lDuring the sewing-operation the sleeve, 18, is detachably held in its lowermost position by means of a hook, 24, fulcrumed at 25, upon a bracket f projecting from the body of the machine, and drawn toward the sleeve, 18, by means of a coil-spring, 26, causing the hook, 24, to automatically engage a shoulder'or flange, 27, on the sleeve, 18, when the sleeve is sufficiently depressed. lVhen the hook, 24, is interlocked with the shoulder, 27 as shown in` Fig. 2, the sleeve, 18, will be held de, pressed so that the apertures, 28, in the sleeve are in line 4with the aperture, 22, in the spindle, 16, permitting the threads to feed freely.

The sleeve, 18, is automatically depressed to permit the hook, 24, to automatically interlock with the shoulder, 27, by means of a pair of cams, one of which, 28, is fixed upon the rear end of the reciprocatory needle-bar, 9, the other cam, 29, being fixed upon the sleeve, 18, in the path of the cam, 28, when the sleeve, 18, is elevated. The movement imparted to the cam, 28, by the forward movement of the needle-bar, 9, is sufficient to depress the cam, 29,` and the r sleeve, 18, to permit the hook, 24, to interlockwith the shoulder, 27 on the sleeve.

The lower end, 80, of the hook-lever projects` into the path of the lower arm, 6, by

theangledever which `carries the disk, 8, in

position' to beengaged and operated by the alan,4 6, to release the hook, 24, from the shoulder, 27, when the arm, 4, is moved to separate the disks, 2-8, to permit the withdrawal of the work. It will thus be seen that the separation of the disks, 2-8, to release ,thel work is automaticallyV accompanied by the releasing ofthe sleeve, 18, t'o the action of the spring, 19, which instantly forces the sleeve upward to lock the thread as laho'vedescribed, and as shown in Fig. 8. In order to leave suiiicient slack in the thread which can be drawn out with the I work and then severed therefrom to leave properly projecting ends which will not be` withdrawn through the eyes of the needle and looperl-respectively, I locate between the thread-locking mechanism and the tensions, a yielding take-up in the form of a drop-spindle, 8 1, provided in itsupper end with an eye, 82, to receive the threads, 11 and 11a', which drop-spindle is adapted to restV during the sewing operation in a depressed position with its eye, 82, at a substantial distance below the level of the thread-receiving apertures in the guidepost's, 12 andv 14, and the thread-locking ne'cl'ianis'in.A In the depressed position of the drop-spindle, 81, a downwardly extending loop 'or' V-shaped stretch, 84, is formed ineaeh thread which can be taken up as slack by pulling the threads out through the needle and looper after the locking mechanism has become effective. `The dropspindle, .81, reciprocates vertically `in a sleeve 88, mounted in fixed relation to the body of the machine, the spindle being guided in its movements by means of a pin, 85, which travels in a slot, 86, in the sleeve. |The rear side of the drop-spindle, 81, is provided with teeth, 87, adapted to kbe engaged by a dog, 88, through an opening formed in the wall of the sleeve, 88, said dog forming' one arm of an angle-lever. The other arm, 89, of said angle-lever projects into the path of the sleeve, 18, and is adapted to be engaged thereby when said sleevel is depressed to hold thev dog, 88, out of engagement with the teeth, 87. A coilspring, 40, serves to force the dog, 88, into engagement with said teeth, 87, when the angle-lever is released by the upward movement of the sleeve, 18. After the dropspindle, 81, has been raised or partly raised, it is thus prevented by the dog, 88, from again resuming its depressed position until after the thread is released from the locking mechanism by the downward movement of the sleeve, 18. n

The operation of the thread-locking mechanism is as follows: The machine being stopped at the completion of a sewing operation, with the needle withdrawn from the work, 41, the disk, 8, is forced away from loo causing a pull upon the threads, 11 and 11, y

which takes up the slack of the loop, 84, drawingupward the drop-spindle,81, to the position shown in Fig. 8, in which position it is supported by the dog, 88. This `forms stretches, 11b, of these threads between the I work and the needle and looper respectively, which stretches are severed, leaving free ends of the threads sufficient for starting the neXt sewing operation.y When the ma chine is again started, the first kforward movement of the needle-bar causes the cam, 28, to engage the cam, 29, and vforce the sleeve, 18, downward until the shoulder, 27, automatically interlocks with the hook, 24, which downward movement of the sleeve also releases the dog, 88, as above described, permitting the spindle, 81 to drop down to its depressed position as shown in Figs. 2 and 4. i v i What I claim as new and desire to secure by Letters Patent is v Y l. In a machineof the class described, and in combination, stitch-forming mechanism; a presser engageable with thek work;` Va. thread-locking device; mechanisinfor simultaneously imparting to the presser a work-releasing movement and to the threadlocking device a thread-locking movement; and a yielding take-up for the thread between the thread-locking device and the stitch-forming mechanism.

2. In a machine of the class described, and in combination, stitch-forming mechanism; a presser engageable with the work; a pair of telescopically arranged members provided with thread-apertures adapted to aline with one another in one position of said members; a spring adapted to telescopically move one of said members relatively to the other to disaline said apertures; a detent for holding said spring-actuated member with said apertures alined; and means whereby said detent is automatically released by a work-releasing movement of said presser.

3. 1n a machine of the class described, and in combination, stitch-forming mechanism; a presser engageable with the work; a pair of telescopically arranged members provided with thread apertures adapted to aline with one another in one position of said members; means for supporting said members with said apertures alined, while the presser is in engagement with the work; and means for automatically moving one of said members relatively to the other to disaline said apertures simultaneously with a work-releasing movement of the presser.

4. In a machine of the class described,

and in combination, stitch-forming mechanism; an automatically actuated threadlocking device; a yielding movable take-up for the thread between the thread-locking device and the stitch-forming mechanism; a yielding dog for preventing a return movement of said take-up; and means for automatically releasing said dog by an unlocking movement of said thread-locking device.

5. 1n a machine of the class described, and in combination, stitch-forming mechanism; a thread-locking device comprising an apertured spindle and a sleeve telescopically mounted upon said spindle and provided with an aperture adapted in one position to aline with the aperture in the spindle, said alined apertures being adapted to freely receive the thread; a spring tending to move said sleeve to disaline said apertures; an automatically locking hook engageable with said sleeve to hold it in a position with said apertures alined; and means whereby said hook is automatically released at certain times.

6. 1n a machine of the class described, and in combination, stitch-forming mechanism; a thread-locking device comprising an apertured spindle and a sleeve telescopically mounted upon said spindle and provided with an aperture adapted in one position to aline with the aperture in the spindle, said alined apertures being adapted to freely receive the thread; a spring tending to move said sleeve to disaline said apertures; an automatically locking hook engageable with said sleeve to hold it in a position with said apertures alined; means whereby said hook is automatically released at certain times; a yielding take-up for the thread between the thread-locking device and the stitchformingfmechani sm; and a yielding dog for preventing a return movement of the takeup, said dog being held out of operative position by said sleeve while the sleeve is engaged by said hook and automatically engaging the take-up when released by the thread-locking movement of said sleeve.

7. In a machine of the class described, and in combination, stitch-forming mechanism having a movable element carrying a cam; a thread-locking device adapted to be automatically opened by movement of said cam; an automatically engaging detent for holding said thread-locking device open; means for automatically releasing said detent at certain times; and means for automatically closing the thread-locking device when released from the detent.

8. In a machine of the class described, and in combination, stitch-forming mechanism; a pair of work-holdingand-feeding disks; a lever upon one arm of which one of said disks is mounted; a spring engaging the other arm of said lever tending to force said disks together; an automatically closing thread-locking device; and a detent for holding the thread-locking device open adapted to be engaged and released by movement of the spring-engaged arm of said lever.

9. n a machine of the class described, and in combination, stitch-forming mechanism including a needle carried by a reciprocatory needle-bar; a cam mounted upon said needle-bar; a pair of work-holding-andfeeding disks; a lever upon one arm of which one of said disks is mounted; a spring engaging the other arm of said lever tending to force said disks together; a thread-locking device having a movable member whereby it is opened and closed; a spring engageable with said movable member tending to close said thread-locking device; a projection on said movable member adapted to be engaged by said cam to automatically open the thread-locking device; and a detent automatically engageable with said movable member to hold the threadlocking device open and adapted to be engaged and released by movement of the spring-engaged arm of said lever.

10. In a machine of the class described, and in combination, stitch-forming mechanism including a needle carried by a reciprocatory needle-bar; a cam mounted upon said needle-bar; a pair of work-holdingand-eeding disks; a lever upon one arm of which one of said disks is mounted; a spring engagingv the other arm of said lever tending to force said disks together; a threadlocking device having a movable member whereby it is opened and closed; a spring engageable with said-movable member tending to close said thread-locking device; a projection on said movable member adapted to be engaged by said cam to automatically open the thread-locking device; a detent automatically engageable with said movable member to hold the thread-locking device open and adapted to be engaged and released by movement of the spring-engaged arm of said lever; and a yielding take-up forvthe thread between said thread-locking device and the stitch-forming mechanism.

l1. A thread-locking device comprising lil-45,1451

in combination, an apertured spindle having an overhanginghead formed with a flange depending approximately to the line of said aperture; a sleeve slidably mounted on said spindle and provided With an aperture adapted in one position of the sleeve to aline with said spindle-aperture; a spring tending to force the apertured portionV of said sleeve into the space between the upper end of the spindle and said flange; and a detent 'for holding the sleeve with its aperture alined with the aperture in the spindle. In testimony whereof, I have hereunto set my hand this 11th day of October, 1913.

FRANK J. KAUFMANN. Witnesses:

Rosn A. LEDUC, GERTRUDE M. PITZ.

Copies of this 'patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

